diff --git a/src/Senders/FluentEmail.Smtp/SmtpSender.cs b/src/Senders/FluentEmail.Smtp/SmtpSender.cs
index ad511e0a..fb729c81 100644
--- a/src/Senders/FluentEmail.Smtp/SmtpSender.cs
+++ b/src/Senders/FluentEmail.Smtp/SmtpSender.cs
@@ -149,6 +149,7 @@ private MailMessage CreateMailMessage(IFluentEmail email)
                 System.Net.Mail.Attachment a = new System.Net.Mail.Attachment(x.Data, x.Filename, x.ContentType);
 
                 a.ContentId = x.ContentId;
+                a.ContentDisposition.Inline = x.IsInline;
 
                 message.Attachments.Add(a);
             });